US3106760A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for producing cast-in-place pipe
Assignee: No-Joint Concrete Pipe Co
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Filing: 1961-07-06
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Granted: 1963-10-15
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Expires: 1981-07-06
Abstract
No abstract record available.
Inventors
- 👤 Tunsen Elmer Le Roy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:03
CPC Classifications
F; F16; F16L; F16L9/00; F16L9/08; F16L1/00; F16L1/024; F16L1/028; F16L1/038
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
IN APPARATUS FOR PRODUCING CAST-IN-PLACE CONDUITS AND HAVING A SKID SUPPORT ADAPTED TO BE MOVED LONGITUDINALLY ALONG THE BOTTOM OF A TRENCH, AN INNER FROM COMPRISING A LOWER SCREED MEMBER SECURED TO SAID SKID AND HAVING AN OUTER SURFACE ABOVE THE BOTTOM AND INWARDLY OF THE SIDES OF SAID TRENCH THEREBY DEFINING A SPACE WITH THE BOTTOM OF SAID TRENCH FOR RECEIVING CEMENTITIOUS MATERIAL AND FORMING THE BOTTOM CONTOUR OF A CONDUIT, SAID INNER FORM ALSO INCLUDING AN UPPER MEMBER COMPRISED OF A PLURLITY OF SECTIONS RELEASABLY SECURED TOGETHER AND DISPOSED IN OVERLAPPING SLIDABLE RELATIONSHIP WITH RESPECT TO THE LOWER SCREED MEMBER, THE IMPROVEMENT WHEREIN SAID UPPER FORM MEMBER SECTIONS HAVE LOWER DEPENDING EDGES TURNED INWARDLY ADAPTED FOR SLIDABLE ENGAGEMENT
Claim 2
Dependent Claim
120 words
IN APPARATUS FOR PRODUCING CAST-IN-PLACE CONDUITS AND HAVING A SKID SUPPORT ADAPTED TO BE MOVED LONGITUDINALLY ALONG THE BOTTOM OF A TRENCH, AN INNER FROM COMPRISING A LOWER SCREED MEMBER SECURED TO SAID SKID AND HAVING AN OUTER SURFACE ABOVE THE BOTTOM AND INWARDLY OF THE SIDES OF SAID TRENCH THEREBY DEFINING A SPACE WITH THE BOTTOM OF SAID TRENCH FOR RECEIVING CEMENTITIOUS MATERIAL AND FORMING THE BOTTOM CONTOUR OF A CONDUIT, SAID INNER FORM ALSO INCLUDING AN UPPER MEMBER COMPRISED OF A PLURLITY OF SECTIONS RELEASABLY SECURED TOGETHER AND DISPOSED IN OVERLAPPING SLIDABLE RELATIONSHIP WITH RESPECT TO THE LOWER SCREED MEMBER, THE IMPROVEMENT WHEREIN SAID UPPER FORM MEMBER SECTIONS HAVE LOWER DEPENDING EDGES TURNED INWARDLY ADAPTED FOR SLIDABLE ENGAGEMENT
References Cited (Backward Citations)
US2574213A
Cited
US2731699A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-10-14 | 1967-04-15 | 1967-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-14 | 1971-04-15 | 1971-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-14 | 1975-04-15 | 1975-10-15 | $7700.00 | Window Closed / Lapsed |